242 



MAMMALIAN DENTITION 



between central and lateral teeth, both in maxilla and mandible, 

 is about the same as in the second dentition. 



The first obvious difference is seen in the canine which is 

 globular as already stated, has a very convex outer aspect and 

 projects if anything slightly more beyond the occlusal surface 

 of the rest of the teeth than in the adult dentition. The first 

 postcanine in both jaws is a peculiar tooth. Though somewhat 



Fig.85. — Deciduous dentition of modern European (0.95, W.R.U.). Note that 

 except in the case of the incisors the teeth do not represent in miniature the teeth 

 of the adult dentition (Fig. 53). 



molariform it does not present the definite molar characters of 

 the second and is plainly specialized for the purpose of acting 

 as a link between the simple incisors and canines in front and 

 the complex grinder behind. The upper tooth presents outer 

 and inner cusps as in the permanent premolars but its outer 

 cusp is very broad and elongated antero-posteriorly by con- 

 nected styles so that the crown is triangular in shape. The 

 crown of the lower tooth possesses anterior and posterior moie- 

 ties, the latter shaped and presenting cusps like the talonid of 



